This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
O, Lady Mary Ann
Looks o'er the castle wa',
She saw three bonie boys
Playing at the ba';
The youngest he was
The flower amang them a';
My bonie laddie's young,
But he's growin' yet.
O father! O father!
An' ye think it fit,
We'll send him a year
To the college yet:
We'll sew a green ribbon
Round about his hat,
And that will let them ken
He's to marry yet.
Lady Mary Ann
Was a flower i' the dew,
Sweet was its smell,
And bonie was its hue!
And the langer it blossom'd
The sweeter it grew;
For the lily in the bud
Will be bonier yet.
Young Charlie Cochran
Was the sprout of an aik;
Bonie and bloomin'
And straught was its make.
The sun took delight
To shine for its sake,
And it will be the brag
O' the forest yet.
The simmer is gane
When the leaves they were green,
And the days are awa
That we hae seen:
But far better days
I trust will come again,
For my bonie laddie's young,
But he's growin' yet.